Find the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (0, 0)
foci at (-7, 0) and (7, 0)
vertices at (-49, 0), (49, 0)
B. center at (0, 0)
foci at (- 3
, 0) and (3
, 0)
vertices at (-7, 0), (7, 0)
C. center at (0, 0)
foci at (0, -2) and (0, 2)
vertices at (0, -4), (0, 4)
D. center at (0, 0)
foci at (0, - 3
) and (0, 3
)
vertices at (0, -7), (0, 7)
Answer: B
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Graph the function.The relation between the circumference of a circle and its radius is given by c = 2?r. Use the value 3.14 to approximate ?, and plot c as a function of r.
A. 
B. 
C. 
D. 
Provide an appropriate response.Will the substitution method always work for a system of linear equations? Explain your answer.
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
Checking one's calculations and making sure that all of the steps originally planned when attacking the problem were carried out are generally the most efficient ways to verify that one has obtained the correct solution to a combinatorial problem.
Use the table to find the future value. Round to the nearest cent.
$13,000 at 2% compounded annually for 3 years
A. $13,780.00 B. $13,525.20 C. $13,520.00 D. $13,795.73